APA (7th ed.) Citation

Kierkegaard, S., & Kierkegaard, S. (1989). The sickness unto death: A Christian psychological exposition for edification and awakening by Anti-Climacus. Penguin Books.

Chicago Style (17th ed.) Citation

Kierkegaard, Søren, and Soren Kierkegaard. The Sickness Unto Death: A Christian Psychological Exposition for Edification and Awakening by Anti-Climacus. London, England New York, N.Y., USA: Penguin Books, 1989.

MLA (8th ed.) Citation

Kierkegaard, Søren, and Soren Kierkegaard. The Sickness Unto Death: A Christian Psychological Exposition for Edification and Awakening by Anti-Climacus. Penguin Books, 1989.

Warning: These citations may not always be 100% accurate.